JPH0518480B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a circuit board mounting device such as a control device for controlling lighting equipment, electrical appliances, etc. in the home.

BACKGROUND ART A conventional circuit board mounting apparatus of this type has a configuration as shown in FIG. In the figure, 1 is an upper case, and 2 is a lower case, which are fastened together with a plurality of screws and constitute a main body of a control device or the like. Reference numerals 3 and 4 denote a control circuit board and a power supply circuit board built into the main body, with their copper foil surfaces facing each other. The control circuit board 3 is equipped with a switch 6 operated by an operation button 5 mounted on the upper case 1, and the power circuit board 4 is equipped with members such as a relay and a resistor. 7 is a terminal board for supplying power to the power circuit board 4, one end of which is connected to the terminal part of the power circuit board 4 by soldering, and the other end thereof has a terminal screw 8 to which a power wire is screwed.
are screwed together.

The power supply circuit board 4 is attached by being sandwiched between the upper ends of ribs 2a, 2b provided on the inner wall surface of the lower case 2 and the tips of bosses 1a, 1b protruding from the bottom surface of the upper case 1. The bosses 1a and 1b penetrate the control circuit board 3.

The control circuit board 3 is attached by being sandwiched between fastening seats 2d and 2e provided at key points of the upper and lower cases 1 and 2. In addition, a boss 2c protruding from the lower case 2 through the power supply circuit board 4 comes into contact with the back surface near the switch 6 installed on the control circuit board 3, and supports the control circuit board 3 and presses the operation button. This prevents the control circuit board 3 from deforming due to external force when the control circuit board 5 is operated.

Problems to be Solved by the Invention In such a conventional configuration, the control circuit board 3 and the power circuit board 4 are arranged in two stages, and in order to ensure mutual electrical insulation distance between them, the power circuit board 3 and the power circuit board 4 are installed in two stages. Bosses 1a and 1b for attaching the board 4 pass through the control circuit board 3, and bosses 2c for preventing the switch 6 portion of the control circuit board 3 from deforming due to operation of the operation button 5 pass through the power supply circuit board 4. It was hot. For this purpose, it is necessary to provide through holes in the control circuit board 3 and power circuit board 4, which reduces the mounting area of components on the control circuit board 3 and power circuit board 4, making the arrangement of electronic components inefficient. This caused the problem that high-density packaging was not possible.

Furthermore, since the copper foil surfaces of the control circuit board 3 and the power supply circuit board 4 face each other, it is necessary to ensure a sufficient insulation distance. For this purpose, the protruding length of electronic component leads from the copper foil surface, the amount of warpage of the control circuit board 3 and power supply circuit board 4, the amount of deformation due to external forces such as switch operation and connection of power supply wires, and the amount of dust The insulation distance between the two substrates 3 and 4 was calculated and designed by adding these values in consideration of deposition and the like. Therefore, the insulation distance becomes large, and there is also the problem that the height of the main body housing the substrates 3 and 4 becomes high.

Furthermore, when connecting the electric wire to the terminal plate 7, the terminal plate 7
There was also the problem that the power supply circuit board 4 was deformed due to external force being applied to it, causing copper foil breakage, peeling of soldered parts, etc., impairing electrical reliability.

The present invention solves these problems,
By increasing the mounting area of components on the circuit board, electronic components can be mounted at a higher density, and by reducing the insulation distance between circuit boards, the main body can be made more compact. The purpose is to increase resistance to external forces and improve electrical and mechanical reliability.

Means for Solving the Problems The technical means of the present invention for solving the above problems are as follows:
A power supply circuit board, a control circuit board, a rigid electrical insulating board disposed between these two boards, and an upper case and a lower case housing these, the power supply circuit board and the control circuit board The insulating plate is sandwiched between a support portion for each of the substrates and the insulating plate formed on the inner wall surface of the lower case and a sandwiching portion for each of the substrates and the insulating plate formed on the inner wall surface of the upper case. The substrates and the insulating plates are sandwiched between each other at a predetermined distance.

Effect With this configuration, the power supply circuit board, control circuit board, and insulating board are mounted with their outer peripheries supported by the support parts and clamping parts formed on the inner wall surfaces of the upper case and the lower case, so that the power supply circuit board, control circuit board, and insulating board are mounted with This eliminates the need for through holes in the board and the control circuit board, making it possible to increase the area for mounting components on the board, and making it easier to design the board pattern.

In addition, since the opposing copper foil surfaces of the power supply circuit board and the control circuit board are insulated by an insulating plate, the length of the leads of electronic components that are inserted through the board can be set at a predetermined distance, thereby reducing the height of the main body. This makes it possible to reduce the height and make it more compact.

Furthermore, the external force applied to the power circuit board when inserting the wire into the quick-connect terminal unit is supported by the rigid insulating board, which eliminates deformation of the power circuit board due to external force, and prevents damage such as foil breakage and peeling of soldered parts. It is possible to prevent this occurrence and improve electrical and mechanical reliability.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 9 is an upper case, and 10 is a lower case, which are fastened together with a plurality of screws to constitute the main body of the control device. Inside this main body, a power circuit board 11, a control circuit board 12, and a power insulating board 21, which are electrically connected and have copper foil surfaces facing each other, are installed with a predetermined distance from each other.

The lower case 10 is formed into a box shape made of electrically insulating material, and has a shelf-shaped power circuit board on its inner wall that supports the power circuit board 11 at a depth corresponding to a predetermined distance from the opening surface 24. A support portion 14 is formed to protrude inward. A part of this power supply circuit board support part 14 extends upward from the opening surface 24 to a height corresponding to a predetermined distance, and
A plurality of columnar control circuit board support portions 19 are formed inside the control circuit board 1 to support the control circuit board 12. Furthermore, a step-shaped insulating plate support portion 23 for supporting the insulating plate 21 is formed in the opening surface 24 .

The upper case 10 is formed in a box shape from an electrically insulating material, and the control circuit board 12 supported by the control circuit board support part 19 of the lower case 9 below the opening surface 25 is sandwiched on the inner wall surface of the upper case 10. A plurality of control circuit board clamping parts 20 are formed to protrude inward.
Further, the opening surface 25 extends upward from the opening surface 25, and the power circuit board 1 is inserted into the lower case 9 and supported by the power circuit board support part 14 of the lower case 9.
A plurality of columnar power supply circuit board clamping parts 1 that clamp 1
5 is formed. The opening surface 25 of the upper case 10 serves as a clamping part for clamping the insulating plate 21 supported by the insulating plate supporting part 23 of the lower case 9.

The power circuit board 11 includes a terminal case, a terminal board,
It is comprised of a leaf spring, etc., and is equipped with a quick-connect terminal unit 13, electronic components, etc., which can connect electric wires such as a power source and an electric load from outside the main body without screws. The terminal board of this quick-connect terminal unit 13 protrudes from the copper foil surface of the power circuit board 11, and is electrically and mechanically connected to the power circuit board 11 by soldering, and its tip is attached to the surface of the insulating board 21. are in contact. This power supply circuit board 11 uses a power supply circuit board support part 14 formed on the inner wall surface of the lower case 10 as a seat at its outer peripheral part, and a power supply circuit board clamping part 15 formed on the inner wall surface of the upper case 9 as a seat. and installed.

The control circuit board 12 is equipped with a switch 17 operated by an operation button 16 mounted on the upper case 9, a switch 17a manually inputted from the outside, an indicator lamp 18, electronic components, and the like. This control circuit board 12 has a control circuit board support part 19 extending upward from the opening surface 24 of the lower case 10 as a seat on its outer circumference, and a control circuit board clamping part formed on the inner wall surface of the upper case 9. It is attached by being sandwiched between the parts 20.

21 is the power supply circuit board 11 and the control circuit board 1;
A rigid electrical insulating board placed between the
A support bush 22 that comes into contact with the copper foil surface of the control circuit board 12 is fixed to one side. The other surface is in contact with the tip of the terminal plate of the quick-connect terminal unit 13. The insulating plate 21 is mounted on the outer periphery of the insulating plate support part 23 formed in the opening surface 24 of the lower case 10, and is sandwiched between the opening surface 25 of the upper case 9. Note that the opening surface 25 for sandwiching the insulating plate 21 may alternatively be formed with a step-shaped shoulder on the power circuit board clamping portion 15, and the board may be clamped by this shoulder. be.

As described above, the power supply circuit board 11, the control circuit board 12, and the insulating board 21 are connected to the upper case 9 and the lower case 10.
Power circuit board support part 14, power circuit board clamping part 15, and control circuit board support part 1 formed on the wall surface of
9, control circuit board clamping part 20, insulating plate support part 2
3. They are clamped and attached within the main body with predetermined intervals maintained through the opening surfaces 25, respectively. 25
is a screw that fastens the upper case 9 and the lower case 10.

As described above, the respective supporting parts 14, 19, 23 and the respective clamping parts 15, 2 to which the power supply circuit board 11, control circuit board 12, and insulating plate 21 are mounted
0 and 25 are formed by extending the inner wall surface or the inner wall surface of the upper case 9 and lower case 10, respectively, and sandwich the outer peripheries of the power supply circuit board 11, control circuit board 12, and insulating plate 21. Therefore, there is no need to provide through holes in the power supply circuit board 11 and the control circuit board 12 to support and clamp them, and the area for mounting components on the board becomes larger, making the arrangement of electronic components more efficient and increasing the cost. This enables high-density packaging and facilitates pattern design.

To connect an electric wire to the quick-connect terminal unit 13, insert the electric wire from the lower part of the lower case 10 through the wire insertion opening of the quick-connect terminal unit 13, and connect the electric wire with the terminal plate of the quick-connect terminal unit 13 and the leaf spring. The external force applied to the quick-connect terminal unit 13 when inserting the wire is supported by the contact between the tip of the terminal plate and the rigid insulating plate 21.
Since the external force is not applied to the power circuit board 11 or to the soldered portions of the terminal board, breakage of the copper foil, peeling of the soldered portions, etc. do not occur.

Similarly, the external force due to the operation of the operation button 16 is
Since the control circuit board 12 is supported by the support bush 22 fixed to the insulating plate 21, the control circuit board 12 will not be deformed. Note that the mounting position of the support bush 22 is not limited, and a plurality of support bushes 22 may be provided.

Furthermore, the quick connection terminal unit 13 is connected to the power supply circuit board 1.
2, it is necessary to set the insulation distance between the power supply circuit board 11 and the control circuit board 12 in sufficient consideration of deformation due to external force when inserting electric wires. However, in the present invention, a rigid insulating plate 21 is disposed between the power supply circuit board 11 and the control circuit board 12, and the power supply circuit board 12 is
1 and the control board 12 when the operation button 16 is operated, the distance between the two boards 11 and 12 can be reduced, and the height of the main body can be reduced, making it more compact. It is.

Effects of the Invention As described above, the present invention arranges a rigid insulating plate between a power supply circuit board and a control circuit board, and each supporting part and each clamping part formed on the inner wall surfaces of the upper case and the lower case. Since each board and insulating plate are sandwiched together and attached while maintaining a predetermined distance from each other,
The mounting area of components on the power supply circuit board and control circuit board can be increased, the arrangement of electronic components can be made more efficient, and high-density mounting is possible.
This facilitates pattern design.

In addition, the power supply circuit board and control circuit board are not affected by external forces when inserting electric wires or operating operation buttons, and there is no deformation of the board or peeling of soldered parts, resulting in improved electrical reliability. It will be expensive.
Moreover, even if the distance between the power supply circuit board and the control circuit board is reduced, a sufficient insulation distance can be ensured, and the main body can be made more compact and the electrical and mechanical reliability can be improved.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of a circuit board mounting device for a control device, etc. of the present invention, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3 is a conventional circuit board mounting device for a control device, etc. There is a side sectional view showing. 9... Upper case, 10... Lower case, 11...
Power supply circuit board, 12... Control circuit board, 13...
Quick connection terminal unit, 14...Power circuit board support part, 15...Power circuit board clamping part, 19...Control circuit board support part, 20...Control circuit board clamping part,
21... Insulating plate, 22... Support bushing, 23...
...Insulating plate support part, 24... Opening surface, 25 (insulating plate clamping part).

Claims (1)

[Scope of Claims] 1. A power supply circuit board equipped with a quick connection terminal unit for connecting electric wires inserted from outside the main body, and a control circuit board electrically connected to the power supply circuit board and having copper foil surfaces facing each other. , comprising a rigid electrical insulating board disposed between the power circuit board and the control circuit board, and an upper case and a lower case housing these, the power circuit board, the control circuit board, and the insulating board , the substrates and the insulating plate are sandwiched between a support portion for each of the substrates and the insulating plate formed on the inner wall surface of the lower case and a clamping portion for each of the substrates and the insulating plate formed on the inner wall surface of the upper case; A circuit board mounting device for a control device, etc., in which each board and an electrically insulating board are sandwiched with a predetermined distance between them. 2. On one side of the electrical insulating board, the tip of the terminal plate of the quick connection terminal unit installed on the power supply circuit board comes into contact, and on the other side, a supporting bush is placed so that the tip of the terminal plate comes into contact with the control circuit board. A fixed circuit board mounting device such as a control device according to claim 1.